It looks more like a broken shell to me (my house is bath stone and has broken shells of varying colours of a similar nature) than a flower and just up to the left the grey shiny bit of rock looks a bit like a snail shell but as they say don't get your hopes up as us humans can see pattens that are often not there, but fingers crossed fossils on Mars might be the attraction that the Mars tourist board needs to attract visitors.

_________________Someone has to tilt at windmills.So that we know what to do when the real giants come!!!!